I recently moved to AZ and have a black 2008 BMW that is my wife's daily driver. What wax or coating would be recommended for the hot weather and UV rays here? It can get up to 100+ degrees here regularly and I am apt to believe that many products will simply not last in the heat. The other issue is that this is also an extremely dusty environment and the car is parked outside during the day. I currently have CG's Blacklight and topped that with Colonite 845 and it looks great. Would FK1000 be a better choice or how about V7, or other suggestions? Thanks